Install BarCode generator
From PlcWiki
create user in MySQL
mysql> GRANT ALL PRIVILEGES ON plc.* TO 'plc'@'localhost' IDENTIFIED BY 'wklokan' WITH GRANT OPTION; mysql> flush privileges;
tomcat/conf/context.xml
<Resource name="jdbc/PLCDB" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" factory="org.apache.commons.dbcp.BasicDataSourceFactory" username="plc" password="wklokan" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/plc?autoReconnect=true&useUnicode=true&characterEncoding=iso8859-1"/>